Wiper blade for cleaning vehicle panes

ABSTRACT

A wiper blade is proposed, which is used for cleaning windows, particularly of motor vehicles. The wiper blade ( 10 ) has an elongated, rubber-elastic wiper strip ( 14 ), which can be placed against the window ( 22 ) and is connected in a longitudinally parallel fashion to an elongated, spring-elastic support element ( 12 ), which has a connecting device ( 16 ) for a wiper arm ( 18 ). The wiper blade has two band-like spring strips ( 28, 30 ), which are parallel to each other and are disposed in a plane spaced a distance ( 26 ) apart from the window ( 22 ) and whose one, inner longitudinal edges ( 32 ) disposed close to each other are spaced a distance ( 34 ) apart from each other, and the wiper strip, which has a uniform cross section over its longitudinal span, has a strip-like wiper lip ( 102 ), which can be placed against the window and which, by means of a narrow intermediary strip ( 102 ) that is formed by opposing groove-like constrictions ( 106 ), is connected to a covering strip ( 104 ) secured to the support element ( 12 ), and the spring strips secure the wiper strip. A wiper blade, which is particularly low-profile and therefore insensitive to the flow conditions of the window, is obtained if each of the two inner longitudinal edges ( 32 ) of the spring strips ( 28, 30 ) is disposed in one of the two groove-like constrictions ( 106 ) of the wiper strip ( 100 ), where the width of the constriction grooves ( 106 ), at least over an outer partial region, is greater than the thickness of the spring strips ( 28, 30 ).

BACKGROUND OF THE INVENTION

In known wiper blades, the purpose of the support element is to assureas uniform as possible a distribution of the wiper blade pressureagainst the window, which pressure is exerted by the wiper arm, over theentire wiping field wiped by the wiper blade. Through an appropriatecurvature of the unloaded support element—i.e. when the wiper blade isnot resting against the window—the ends of the wiper strip, which isplaced completely against the window during operation of the wiperblade, are loaded toward the window by the support element, which isstretched in this state, even though the curvature radii of sphericallycurved vehicle windows change with each wiper blade position. Thecurvature of the wiper blade must therefore be somewhat sharper than thesharpest curvature measured within the wiping field on the window to bewiped. The support element consequently replaces the expensive supportbracket structure with two spring strips disposed in the wiper strip, asis the practice in conventional wiper blades (DE-OS 15 05 357).

In a known wiper blade of the type known in the prior art (DE-OS 198 14609). the support element ha two spring strips, which rest in receivinggrooves disposed in the two longitudinal sides of a rubber-elastic wiperstrip. This wiper strip has a top strip, which is essentiallyrectangular in cross section, with receiving grooves for the springstrips of the support element (FIG. 13), and has a strip-shaped wiperlip, which performs the wiping function on the window. The top strip andthe wiper lip are of one piece and are connected to each other by meansof an intermediary strip so that opposing walls of the top strip and thewiper lip are spaced apart from each other and constitute supports forthe wiper lip, which is always disposed in a so-called drag positionduring the reciprocating wiper motion. In practice, it has turned outthat under certain conditions, the flow conditions in front of thewindow reduce the pressure of the wiper blade against the window. Areduction of the wiper blade height in order to minimize thisdisadvantage can be achieved—as demonstrated by the known wiper bladeshown in FIG. 12—by embodying the support element as a one-piece springstrip and attaching it, for example gluing it, to the top side of thetop strip remote from the wiper lip. A glued connection of this kind canonly adapt insufficiently to the harsh operating and environmentalconditions—such as alternating stress, cold, heat, ozone influence,etc.,—for the wiper blade.

SUMMARY OF THE INVENTION

In the wiper blade according to the invention, the two spring strips arerespectively disposed in one of the two existing groove-likeconstrictions of the wiper strip so that special receiving grooves areno longer required in the top strip of the wiper strip. This reduces theheight of the wiper blade without requiring a problematic gluedconnection between the support element and the wiper strip. Because thewidth of the construction groove in a partial region is greater than thethickness of the spring strips, the wiper lip can always tilt into therequired drag position during wiper operation.

In this connection, it is particularly advantageous if the lateraldefining surfaces of the groove-like constrictions diverge from theintermediary strip to the longitudinal sides of the wiper strip. With acorresponding matching, the spring strips can thus guide the wiper stripon the intermediary strip and simultaneously allow the wiper lip toexecute its required tilting motion into the drag position.

A modification of the invention provides that one of the lateraldefining surfaces of the groove-like constriction has a sphericalcourse, viewed in cross section. This permits a favorable and quietrolling motion of this side wall against the band surface of therelevant spring strip oriented toward it.

This advantage can be further improved if both lateral defining surfacesof the groove-like constrictions have a spherical course, viewed incross section.

According to one embodiment of the invention, the wiper lip has acompletely enclosed longitudinal conduit in order to encourage anoptimal contact of the wiper strip against the preferably sphericallycurved window to be wiped.

If in addition, an air gap remains between the opposing longitudinaledges of the spring strips and the longitudinal sides of theintermediary strip adjacent to them, this produces a tension-freeguidance of the wiper strip and thereby a quiet, effective wiperoperation.

So that it is no longer necessary to carry out particular steps tofasten a connecting device for a wiper arm that moves the wiper blade,each of the two spring strips, at least with a central edge strip,protrudes from its groove-like constriction so that the connectingdevice can be fastened to the free edge strips.

Embodying the two spring strips as separate components can result inmanufacturing advantages.

The wiper blade can be assembled with the support element in aparticularly simple manner if the two spring strips are connected bymeans of at least two crosspieces disposed at their end sections andeach crosspiece has a middle section, which extends spaced apart fromthe upper band surface of the spring strips, producing bridge-like acrosspieces, where the distance between the two longitudinal springstrips is less than the bridge width.

Advantages in the manufacture of the wiper blade are achieved if thecrosspieces are embodied as separate components and are connected to thespring strips.

For the connection between the spring strips and the crosspieces, it issuitable if the crosspieces are fastened to the upper band surfaces ofthe two spring strips.

So that the wiper blade and/or its wiper strip can easily adapt to therespective window curvature during wiper operation, it has turned out tobe advantageous if the length of the spring strips is greater than thelength of the wiper strip, because then, through appropriateembodiments, a certain, advantageous longitudinal mobility of the wiperstrip in relation to the support element can be assured.

A stable, low-torsion support element is produced if at least onecrosspiece is disposed at each end section of the two associated springstrips. Depending on the length of the wiper blade, however, it is alsoquite conceivable to connect the two spring strips to each other bymeans of additional bridge-like crosspieces. In short wiper blades, ithas turn out that placing a single crosspiece at each end section of thesupport element is sufficient to achieve a stable, torsion-free wiperblade.

An additional stabilization of the support element is achieved if acrosspiece disposed in the central region of the two associated springstrips is embodied as part of a connecting device for connecting thewiper blade to the wiper arm.

In a modification of the invention, at least one of the two crosspieces,which is respectively disposed at one of the end sections of the springstrips, has a stop, which is connected to its middle section andpartially covers the end of the wiper strip adjacent to it. Thisprevents the wiper strip from creeping out of the support element in thelongitudinal direction of the wiper blade. When a crosspiece, which isprovided with a stop, is respectively disposed at each of the two endsof the support element, the distance between the two stops is greaterthan the length of the wiper strip in order to assure a favorableadaptation of the wiper strip to the respective window curvature.

In order to reduce the danger of injury when manipulating the wiper,each crosspiece disposed at the end sections of the two spring strips isprovided with a covering cap that is preferably made of plastic.

Other advantages during the wiping operation of the wiper according tothe invention ensue from the fact that the thickness of a wall orintermediary strip between the two longitudinal grooves in the wiperstrip is less than the distance between the adjacent longitudinal edgesof the two associated spring strips. The longitudinal play of the wiperstrip in the support element consequently produces a “free-floating”,tension-free wiper strip, which can continuously adapt to the windowprofile during wiper operation without being impaired by a clampedconnection.

Other advantageous improvements and updates of the invention aredisclosed in the following description of exemplary embodiments shown inthe accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a wiper blade according to the invention,

FIG. 2 is a prolate depiction of the wiper blade from FIG. 1, in aperspective representation not drawn to scale,

FIG. 3 shows a foreshortened support element associated with the wiperblade according to the invention, in an enlarged, prolate, perspectivedepiction,

FIG. 4 shows an enlargement of the sectional plane of a section alongthe line IV—IV in FIG. 2,

FIG. 5 shows an enlargement of a detail labeled V in FIG. 2,

FIG. 6 shows the sectional plane of a section according to FIG. 4through another embodiment of the wiper blade according to theinvention,

FIG. 7 shows the wiper blade from FIG. 6 in a detail that corresponds toFIG. 5,

FIG. 8 shows the sectional plane of a section according to FIGS. 4 and 6through another embodiment of the wiper blade according to theinvention,

FIG. 9 is a schematic representation of the sectional plane of a sectionalong the line IX—IX in FIG. 2 through a wiper blade according to theinvention, in an enlarged depiction, in which the wiper blade is placedagainst the window surface to be wiped,

FIG. 10 shows the wiper blade from FIG. 9 during wiper operation in onewiping direction, and

FIG. 11 shows the wiper blade from FIG. 9 during wiper operation in theother wiping direction.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

A wiper blade 10 indicated in FIGS. 1 and 2 has a band-like, elongated,spring-elastic support element 12, against whose underside 13 anelongated, rubber-elastic wiper strip 14 is disposed in a longitudinallyparallel fashion. On the top side 11 of the support element 14, which isalso referred to as a spring bar, the center section of this part isprovided with the wiper blade part 16 of a connecting device, with theaid of which the wiper blade 10 can be detachably connected in anarticulating fashion to a driven wiper arm 18 indicated with adot-and-dash line in FIG. 1. To that end, the free end of the wiper arm18 is provided with the wiper arm part of the connecting device. Thewiper arm 18 is loaded in the direction of the arrow 20 toward thewindow to be wiped, for example the windshield of a motor vehicle, whosesurface to be wiped is indicated with a dot-and-dash line 22 in FIG. 1.Since the line 22 is intended to represent the sharpest curvature of thewindow surface, it is clear that the curvature of the wiper blade 10,which is resting with both of its as yet un-stressed ends against thewindow, is sharper than the maximal window curvature (FIG. 1). Due tothe pressure (arrow 20), the wiper blade 10 places its wiper lip 24 overits entire length against the window surface 22. This causes a stress tobe built up in the spring-elastic support element 12, which is made ofmetal for example, which stress produces a uniform contact of the wiperstrip 14 and the wiper lip 24 over its entire length against the windowand produces a uniform distribution of the pressure.

A first embodiment of the wiper blade will be explained in detail belowin conjunction with FIGS. 3 to 5. FIG. 4 shows that the support element12 of the wiper blade 10 is spaced a distance 26 apart from the window22 to be wiped. Its position is designed so that its band surfaces 11and 13 are disposed in a plane extending essentially parallel to thewindow surface 22 to be wiped. The particularly advantageous design ofthe support element 12 is shown particularly in FIGS. 3 and 4. It hastwo band-like spring strips 28 and 30 disposed in a common plane, whichare aligned parallel to each other. The inner longitudinal edges 32 arespaced a distance 34 apart from each other. The spring strips 28, 30 areconnected to each other at each of the two ends by means of abridge-like crosspiece 36 and 38, for example by means of welds. In thisinstance, each bridge-like crosspiece rests with its end sections 40against the top side 11 of the support element 12 or its spring strips28, 30. Each of the two lateral strips 36 and 28 has a middle section 42which is spaced a distance 44 apart from the upper band surface 11 ofthe spring strips, thereby forming the basis of its bridge-like design.Since the longitudinal span 46 of the middle sections 42 is greater thanthe distance 34 between the opposing inner longitudinal edges 32, thetwo spring strips 28 and 30 extend with inner edge strips 48 into theregion of the middle sections 42, where the edge strips 48 are disposeda distance 44 underneath the middle sections 42. In addition to theabove-mentioned purposes of the support element 12 with regard topressure distribution, it should also assure a regulation-compliant,tension-free guidance of the wiper strip 14 during wiper operation. Thisalso assures a quite wiper operation.

The wiper strip 14 of this first embodiment has a cross section, whichwill be clarified in conjunction with FIG. 4. It has a top strip 50 thatis connected to the wiper lip 24, which performs the actual wipingfunction, by means of a narrow intermediary strip 52. The disposition ofthe intermediary strip 52 permits the wiper lip 24 to tilt into a dragposition that encourages the wiping function, which will be explainedlater. On its opposing longitudinal sides, the top strip 50 is providedwith longitudinal grooves 54 and 56 that are open at the edges orientedtoward these longitudinal sides. The longitudinal grooves 54 and 56serve to contain the inner edge strips 48 of the spring strips 28 and30. The depth of the longitudinal grooves 54 and 56 is selected so thata wall 58 remains between the two longitudinal grooves. The top strip 50consequently has a main strip 60 and a covering strip 62, which areconnected to each other by means of the wall 58. The thickness 64 of thewall 58 is less than the distance 34 between the inner longitudinaledges 32 of the spring strips 28, 30, i.e. less than the distancebetween their inner edge strips 48. The width of the two longitudinalgrooves 54 and 56 in the top strip 50 is matched to the thickness of thespring strips 28, 30 and/or their inner edge strips 48 so that atension-free securing of the wiper strip to the support element 12 isassured when the wiper strip according to FIG. 4 is put together withthe support element 12 according to FIG. 3. Since the width 66 of thecovering strip 62 is somewhat less than the longitudinal span 46 of themiddle section 42, also referred to as the bridge width, and itsthickness 67 is less than the distance 44 between the middle section 42and the top sides 11 of the spring strips 28, 30, wiper strip 14, whichhas a uniform cross section over its entire longitudinal span, caneasily be inserted longitudinally into the support element 12 and thusconnected to it.

FIG. 5 shows another exceptional feature of the wiper blade according tothe invention. This figure shows that on its side oriented toward thewiper blade end, in its middle section, the crosspiece 70 disposed atone end of the support element is provided with a stop 74, which isconnected to it and which at least partially covers the end face 72adjacent to it. The stop 74 is constituted by a tab-like projection fromthe middle section 42, which projection is bent at right angles. If eachof the two wiper blade ends or each of the two support element ends isprovided with a crosspiece 70 according to FIG. 5, care must be takenthat the distance between the opposing inner wills 75 of the stop tabs74 is slightly greater than the length 76 of the wiper strip 14 (FIG.2). This can also be achieved, for example, by the length 78 of thesupport element 12 being slightly greater than the length 76 of thewiper strip 14. The placement of the stops 74 at both ends thusconstitutes an effective securing means for preventing the wiper strip14 from creeping in the longitudinal direction out of its supportelement 12 during wiper operation. Naturally, in such a case, at leastone of the two stop tabs 74 is bent at right angles is executed onlyafter the wiper strip 14 is inserted into the support element 12.

The wiper arm part 16 of the connecting device disposed in the middlesection of the wiper blade 10 engages around the outer edge strips 80 ofthe spring strips 28, 30 or the support element 12 protruding from thelongitudinal grooves 54 and 56. The connection between the part 16 andthe support element 12 can be produced by means of positive orfrictional engagement. With a corresponding length of the wiper blade,it can also be useful to provide additional corresponding crosspiecesbetween the two crosspieces 36 and 38 disposed at the ends. In order toprevent injury when the wiper blade is being manipulated, particularlyby the end user, a covering cap 82 that is preferably made of plastic isdisposed on the two spring strips 28, 30 or the crosspieces 36, 38 atthe end, preferably connected to them in detent fashion (FIGS. 1 and 2).

FIGS. 6 to 8 show additional embodiments of the wiper blade according tothe invention.

The support elements of these embodiments fully correspond to thesupport elements 12 from FIGS. 3 to 5 explained above so that thereference numerals used for them in these figures can be adopteddirectly. The embodiment of the wiper strip 100 in this embodiment,though, differs fundamentally from the design of the wiper strip 14 inthe embodiment described above. As FIG. 6 in particular shows, the wiperstrip 100 has only one wiper lip 101, which is of one piece with acovering strip 104 and is connected to it by means of an intermediarystrip 102. The main strip 60 in the exemplary embodiment described abovein conjunction with FIGS. 4 and 5 is consequently eliminated. The inneredge strips 48 of the spring strips 28 and 30 rest in groove-likeconstrictions 106 of the wiper strip 100, which are required to producethe narrow intermediary strip 102. Consequently, the lateral definingsurface 108 of the constriction 106 embodied on the covering strip 104is oriented toward the upper band surface 11 of the support element 12.The other lateral defining surface 110 of the groove-like constriction106 is consequently disposed directly opposite from the lower bandsurface 13 of the support element 12. It is consequently clear that eachof the two inner longitudinal edges 32 of the two spring strips 28, 30or of the support element 12 is disposed in one of the two groove-likeconstrictions 106 of the wiper strip 100. In addition, FIG. 6particularly shows that the two lateral defining surfaces 110 of theconstrictions 106 are embodied spherically and are disposed so that thewidth dimension of the groove-like constrictions 106 is wider than thethickness of the spring strips 28, 30, at least over an outer partialregion. It is therefore possible for the wiper lip 101 to tilt over intothe desired, advantageous drag position during wiper operation. In thisembodiment of the wiper blade according to the invention as well, thewidth 112 of the intermediary strip 102 is matched to the distance 34between the opposing inner longitudinal edges 32 of the spring strips28, 30 in such a way that an air gap remains between the intermediarystrip and the spring strips. Here, too, the thickness 114 of thecovering strip 104 is also slightly less than the distance 44 betweenthe middle section 42 of the crosspiece 36 and the inner edge strip 48.Also, the width 116 of the covering strip 104 is slightly less than thelongitudinal span 46 of the middle section 42 of the bridge-likecrosspieces 36. As a result, it is possible to insert the wiper strip100, which has a uniform cross section over its entire length, withouttrouble into the support element 12 over its longitudinal span so thatthe installation position shown in FIG. 6 is achieved.

In this embodiment as well, the plane in which the support element 12extends is spaced the distance 26 apart from the surface 22 of thewindow 22 to be wiped.

As described above in conjunction with FIG. 5, in this embodiment of thewiper blade according to the invention as well, each of the twobridge-like crosspieces 70, at their outer ends in the longitudinal spanof the wiper blade, can be provided with a stop 74, which is bent atright angles so that after the wiper strip 14 is inserted into thesupport element 12 and the stop tabs 74 are bent at right angles, thewiper strip 100 is assured of being longitudinally secured in thesupport element 12. It is clear that in this embodiment as well, thedistance between the opposing inner walls 75 of the stop tabs 74 must beslightly greater than the length 76 of the wiper strip.

Another embodiment of the wiper blade according to the invention will beexplained in conjunction with FIG. 8. The embodiment according to FIG. 8corresponds in its basic design to the design of the embodimentdescribed in conjunction with FIG. 6. In contrast to the embodimentaccording to FIG. 6, though, in this embodiment, not only the lateraldefining surfaces 110 of the groove-like constrictions 106, but also theother lateral defining surfaces 108 embodied on the covering strip 104are embodied spherically. The embodiment according to FIG. 8 alsodiffers from the embodiment according to FIG. 6 by means of acontinuous, completely closed longitudinal conduit 118 disposed in thewiper lip 101. The disposition of the longitudinal conduit 118 in thewiper lip can be used by itself or in connection with additionallongitudinal grooves, for a smooth, quiet tilting behavior of the wiperlip during wiper operation. In addition, its disposition is notabsolutely required in connection with the spherical embodiment of thedefining surfaces 108, 110.

As is clear from FIGS. 2 and 3, the width of the support element 12 isthe same over its entire longitudinal span. However, it is alsoconceivable for the support element to taper toward the end sections ofthe wiper blade. In order for the part 16 to be fastened to the wiperblade, it is sufficient if each spring strip 28, 30, at least with acentral, outer edge strip 80, protrudes from its groove-likeconstriction so that the part 16 of the connecting device can befastened to this edge strip 80. Instead of a support element 12according to FIG. 3, it is also conceivable for the two spring strips tobe embodied as separate components and to be disposed in the groove-likeconstrictions of the wiper strip. The securing, in particular of thedistance 34, can then be performed by other components that are notshown in detail.

FIGS. 9 to 11 show schematic sectional depictions of the wiper bladeaccording to FIGS. 6 and 7, cut along the line IX—IX in FIG. 2; in FIG.9, the wiper blade 10 is merely placed with its wiper lip 101 againstthe window surface 22 to be wiped. The wiper strip 100 is secured withplay between the inner longitudinal edges 32 of the two spring strips28, 30 (also see FIGS. 3 and 4). Since the length 76 of the wiper strip100 is also slightly less than the length 78 of the support element 12or is slightly less than the distance between the opposing inner walls75 of the stops 7 at the two ends of the support element 12, thisproduces a so-called “free-floating”, tension-free, but operationallyreliable securing of the wiper strip 100 in the support element 12.

If during wiper operation, the wiper blade 10, loaded by the pressure(arrow 20 in FIG. 1), is then moved across the window 22 in thedirection of the arrow 122 in FIG. 10, then the wiper lip 101 tilts inthe vicinity of the intermediary strip 102 into an advantageous dragposition in which the support element 12 comes slightly closer to thewindow (arrow 123). The tilting motion is limited by the fact that alateral defining surface 110 of the one groove-like constriction 106 issupported against the underside 13 of the one spring strip 30. When thewiper blade 10 has reached its reversal position and is moved by thewiper arm 18 in the opposite direction (arrow 124 in FIG. 11), the wiperlip 101 tilts through an intermediary position shown in FIG. 9, into itsother drag position (FIG. 11), in which the wiper lip 101 is supportedwith the lateral defining surface 110 of the other groove-likeconstriction 106 against the underside 13 of the other spring strip 28.

When the drag positions of the wiper lip 101, close to their reversalpositions—due to the usually spherical curvature of the windshield22—approaches the window, the spherically embodied defining surfaces 110roll silently against the undersides 13 of the spring strips 28, 30.Correspondingly, the other spherical defining surfaces 108 of thegroove-like constrictions 106 can, if necessary, also roll against thetop sides 11 of the spring strips 28 and 30.

1. A wiper blade (10) for windows, comprising: an elongated,rubber-elastic wiper strip (14), wherein said wiper strip can be placedagainst the window (22); an elongated, spring-elastic support element,wherein said wiper strip is connected in a longitudinally parallelfashion to the elongated, spring-elastic support element (12), whereinthe elongated, spring elastic support element has a connecting device(16) for a wiper arm (18) and has two band-like spring strips (28, 30),which are parallel to each other and are disposed in a plane spaced adistance (26) apart from the window (22) and wherein inner longitudinaledges (32) of the two band-like spring strips disposed close to eachother are spaced a distance (34) apart from each other, and the wiperstrip, which has a uniform cross section over its longitudinal span, hasa strip-like wiper lip (101), wherein the wiper lip can be placedagainst the window and wherein the wiper lip is connected to a coveringstrip (104) secured to the support element (12) by means of a narrowintermediary strip (102) that is formed by opposing groove-likeconstrictions (106), and wherein the spring strips secure the wiperstrip, wherein each, of the two inner longitudinal edges (32) of thespring strips (28, 30) is disposed in one of the two groove-likeconstrictions (106) of the wiper strip (100), wherein the width of theconstriction grooves (106), at least over an outer partial region, isgreater than the thickness of the spring strips (28, 30), wherein thetwo spring strips (28, 30) are connected to each other by at least twocrosspieces (36, 38) disposed at their end sections, and wherein eachcrosspiece has a middle section (42), which extends spaced a distance(44) apart from the upper band surface (11) of the spring strips, thusproducing bridge-like crosspieces, wherein the distance (34) between thetwo longitudinal spring strips (28, 30) is less than the bridge width(46), and wherein each crosspiece (36, 38) disposed at the end sectionsof the two spring strips (28, 30) is provided with a covering cap (82)made of plastic.
 2. The wiper blade according to claim 1, wherein thelateral defining surface (108, 110) of the groove-like constrictions(106) diverge from the intermediary strip (102) to the longitudinalsides of the wiper strip (100).
 3. The wiper blade according to claim 2,wherein one lateral defining surface (110) of the groove-likeconstrictions (106) has a spherical course, viewed in cross section. 4.The wiper blade according to claim 2, wherein both lateral definingsurfaces (108,110) of the groove-like constrictions (106) have aspherical course, viewed in cross section.
 5. The wiper blade accordingto claim 1, wherein the wiper lip (101) is provided with a completelyclosed longitudinal conduit (118).
 6. The wiper blade according to claim1, wherein an air gap remains between the respective opposinglongitudinal edges (32) of the spring strips (28, 30) and therespectively adjacent longitudinal sides of the intermediary strip(102).
 7. The wiper blade according to claim 1, wherein each springstrip (28, 30), at least with a central edge strip, protrudes from itsgroove-like constriction (106).
 8. The wiper blade according to claim 1,wherein the two spring strips (28, 30) are embodied as separatecomponents.
 9. The wiper blade according to claim 8, wherein thecrosspieces (36, 38) are embodied as separate components and are affixedto the two spring strips (28,30).
 10. The wiper blade according to claim1, wherein the two spring strips (28, 30) are connected to each other byat least two crosspieces (36, 38) disposed at their end sections, and inthat each crosspiece has a middle section (42), which extends spaced adistance (44) apart from the upper band surface (11) of the springstrips, thus producing bridge-like crosspieces, where the distance (34)between the two longitudinal spring strips (28, 30) is less than thebridge width (46).
 11. The wiper blade according to claim 10, whereinthe crosspieces (36, 38) are attached to the upper band surfaces (11) ofthe two spring strips (28, 30).
 12. The wiper blade according to claim10, wherein the length of the spring strips (28, 30) is greater than thelength of the wiper strip (14 or 100).
 13. The wiper bade according toclaim 10, wherein a crosspiece (36, 38) is disposed at least at each endsection of the two associated spring strips (28, 30).
 14. The wiperblade according to claim 13, wherein at least one of the two crosspieces(36, 38) disposed at one of the respective end sections of the springstrips (28, 30) has a stop (74), Which is connected to its middlesection and partially covers the adjacent end of the wiper strip (14 or100).
 15. The wiper blade according to claim 10, wherein a crosspiecedisposed in the middle region of the two associated spring strips (28,30) is embodied as part (16) of a connecting device (16) for connectingthe wiper blade (10) to the wiper arm (18).
 16. The wiper bladeaccording to claim 1, wherein the thickness (46 or 112) of anintermediary strip (52 or 102) provided between the two longitudinalgrooves (54, 56, or 106) in the wiper strip (14 or 100) is smaller thanthe distance (34) between the adjacent longitudinal edges (32) of thetwo associated spring strips (28, 30).
 17. A wiper blade (10) forwindows, comprising: an elongated, rubber-elastic wiper strip (14),wherein said wiper strip can be placed against the window (22); anelongated, spring-elastic support element, wherein said wiper strip isconnected in a longitudinally parallel fashion to the elongated,spring-elastic support element (12), wherein the elongated, springelastic support element has a connecting device (16) for a wiper arm(18) and has two band-like spring strips (28, 30), which are parallel toeach other and are disposed in a plane spaced a distance (26) apart fromthe window (22) and wherein inner longitudinal edges (32) of the twoband-like spring strips disposed dose to each other are spaced adistance (34) apart from each other, and the wiper strip, which has auniform cross section over its longitudinal span, has a strip-like wiperlip (101), wherein the wiper lip can be placed against the window andwherein the wiper lip is connected to a covering strip (104) secured tothe support element (12) by means of a narrow intermediary strip (102)that is formed by opposing groove-like constrictions (106), and whereinthe spring strips secure the wiper strip, wherein each of the two innerlongitudinal edges (32) of the spring strips (28, 30) is disposed in oneof the two groove-like constrictions (106) of the wiper strip (100),wherein the two spring strips (28, 30) are connected to each other by atleast two crosspieces (36, 38) disposed at their end sections, andwherein each crosspiece has a middle section (42), which extends spaceda distance (44) apart from the upper band surface (11) of the springstrips, thus producing bridge-like crosspieces, wherein the distance(34) between the two longitudinal spring strips (28, 30) is less thanthe bridge width (46), and wherein each crosspiece (36, 38) disposed atthe end sections of the two spring strips (28, 30) is provided with acovering cap (82) made of plastic.